1. Thunderstorms and heavy rain is mostly associated with high pressure systems.
ID: 290707 • Letter: 1
Question
1. Thunderstorms and heavy rain is mostly associated with high pressure systems. True or False?
2. The frontal zone of a warm front is steep and narrow. True or False?
3. Which of the following have a significant influence on weather in the United States?
A. cP
B. mT
C.mP
D. cT
E. All the above.
F. Mainly cP and mT
4.A ___________ is the transition zone between two air masses with different temperature, humidity, and density characteristics.
5.Conduction refers to:
A.strong horizontal movement of air in the atmosphere.
B.strong vertical movement of air in the atmosphere.
C.the behavior of something.
D.heat that can be sensed by humans as temperature.
E.the molecule-to-molecule transfer of heat energy.
6.A isoline of equal pressure plotted on a weather map is known as an
A. isobar
B. isotherm
C. isobath
D. isohyet
E. isoplat
7.If there is a steeper pressure gradient, wind will be ________than areas with a gradual pressure gradient.
A. Lighter
B. Weaker
C. Cooler
D. Stronger
E. Warmer
8.If surface winds were influenced only by the pressure gradient force and Coriolis force (i.e., without the frictional force),
A. the effects would vary depending on surface texture.
B.there would be no winds at all.
C.winds would flow in a straight line from areas of higher to lower pressure.
D.winds would flow parallel to isobars and at high rates of speed.
E.wind speed and direction would be reduced.
9.If Earth did not rotate, air would flow
A. In a circular pattern
B.to the right of its direction of motion in the Northern Hemisphere.
C. Parallel to the isobars
D.perpendicular to the isobars, i.e., straight across the isobars.
E.to the left of its direction of motion in the Northern Hemisphere.
10.Relative humidity is
A.the amount of moisture in the air relative to your one's senses.
B.the amount of water in the air per volume of air.
C.the amount of water vapor in the air relative to the water vapor capacity of the air.
D.the amount of water vapor in the air compared to the average amount.
E.a basically unused concept when it comes to weather topics.
Explanation / Answer
1. Thunderstorms and heavy rains are a result of the formation of a low pressure zone in a region. Due to the development of this low pressure zone, the winds from the high pressure zone rushes to the region of low pressure, hence bringing a lot of winds and storms along with it. Therefore the statement in the given question is False.
2. The warm front is generally defined as the region where the warm air replaces cold air. Therefore the usual direction of the warm front is from Southwest to Northeast. Since a front separates a region of warm air mass and a region of cold air mass, therefore the frontal part of the warm front is usually broad and less steep as compared to that of the cold front as because the warm air generally rises up and cold air sinks down. Therefore the statement given is False.
3. According to the koppen's classification, US is in a region of temperate as well as sub tropical region. Therefore out of the given options, (E) would be the most valid one as because the weather conditions prevailing over those regions are highly controlled by all the factors associated with tropical and temperate regions.
4. A transition between the air masses with two different temperature and densities is generally called the weather front. Therefore the best option explained by the question is (B) where there is essentially vertical movement of air within the fronts.
6.The line joining equal pressure in the weather maps is called Isobar
7. If there is a condition of high pressure gradient the wind system iin those areas would be weaker as because the winds generally travels from a region of high pressure gradient to that of the region of low pressure conditions. Therefore the wind system prevailing over the region of lower pressure would experience greater wind velocities and hence the system would be strong there. Therefore the correct option would be (B).
9. If the rotation of earth stops, then the rotaional energy associated with it would also be zero and hence the coriolis force wouldn't work at all. Therefore the air flow would not operate.
10. Relative humidity is defined as the amount of water vapour contained in the atmosphere which is expressed in percentage by the amount of water which is needed to make the air saturated with water at that point. Therefore the correct option out of the given ones are (C).
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